Accession Number : ADA333423

Title :   Superconducting/Semiconducting Hybrids and Advance Memory Concepts for Superconducting Electronics

Descriptive Note : Final rept. 1 May 92-30 Sep 97

Corporate Author : STANFORD UNIV CA SPONSORED PROJECTS OFFICE

Personal Author(s) : Beasley, M. R. ; Horowitz, M. A.

PDF Url : ADA333423

Report Date : NOV 1997

Pagination or Media Count : 8

Abstract : Superconducting logic circuits based on Josephson junctions (JJ) are the fastest, lowest power solid state digital circuit technology known. Large scale integration of such circuits has also been demonstrated. By contrast, current superconducting memory circuits based on flux quantization are not equivalently advanced. Very dense memory chips have not been possible to date and seem unlikely to come without new invention. The goal of this project was to explore alternative approaches to memory that would be compatible with Josephson junction logic circuits and capable of much denser memory arrays. Five new approaches were investigated ranging from modification to the current approach, use of semiconductor CMOS and wholly new concepts based on new physical principles. Three of these were identified as worth pursuing. They are use of cooled CMOS, use of cryogenic hybrid JJ/CMOS memory concepts and a totally new magnetoresistive approach to memory based on the superconductor/ferromagnet proximity effect.

Descriptors :   *SEMICONDUCTORS, *MEMORY DEVICES, *LOGIC CIRCUITS, *HYBRID SYSTEMS, *SUPERCONDUCTIVITY, *LARGE SCALE INTEGRATION, DIGITAL SYSTEMS, SUPERCONDUCTORS, CHIPS(ELECTRONICS), HIGH DENSITY, QUANTIZATION, JOSEPHSON JUNCTIONS, COMPLEMENTARY METAL OXIDE SEMICONDUCTORS, CRYOGENICS, SOLID STATE ELECTRONICS, FERROMAGNETISM.

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE